Created page with "thumb|Messier 57 or Ring Nebula The Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) is a planetary nebula in the northern..."
(Created page with "thumb|Messier 57 or Ring Nebula The Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) is a planetary nebula in the northern...")